What Is Pericardial Mesothelioma?
Pericardial mesothelioma is a rare cancer that develops in the pericardium, the protective sac surrounding the heart. It accounts for roughly 1% of all mesothelioma cases. Symptoms include chest pain, shortness of breath, and pericardial effusion. Treatment options are limited due to the tumor's proximity to the heart.
Understanding Pericardial Mesothelioma
Pericardial mesothelioma is one of the rarest forms of mesothelioma, developing in the pericardium — the double-layered membrane that encases and protects the heart. This cancer accounts for approximately 1% of all mesothelioma cases, with only a few hundred cases described in the medical literature. The pericardium, like the pleura and peritoneum, is composed of mesothelial cells that can undergo malignant transformation.
The pathway by which asbestos fibers reach the pericardium is not definitively established. Researchers hypothesize that fibers may travel through the bloodstream or lymphatic system from the lungs to the pericardial tissue, where they cause the same type of chronic inflammation and cellular damage seen in pleural mesothelioma.
Symptoms
Pericardial mesothelioma symptoms are nonspecific and often mimic other cardiac conditions, which contributes to delayed or missed diagnosis. Common symptoms include chest pain that may worsen when lying down, shortness of breath (dyspnea), heart palpitations or irregular heartbeat, fatigue, and fever. Pericardial effusion — the buildup of fluid in the pericardial sac — is present in most cases and can compress the heart, causing additional cardiovascular symptoms.
Because these symptoms overlap with more common conditions such as heart failure, pericarditis, and coronary artery disease, pericardial mesothelioma is frequently not suspected until other diagnoses have been ruled out or until tissue examination reveals the cancer.
Diagnosis and Treatment
Imaging studies including echocardiography, CT scans, and cardiac MRI can identify pericardial thickening, masses, and effusion. However, definitive diagnosis requires tissue biopsy, which is technically challenging given the location. In a significant percentage of cases, pericardial mesothelioma is not diagnosed until autopsy.
Treatment options are limited by the tumor's proximity to the heart. Surgical resection (pericardiectomy) is possible in select cases when the tumor has not invaded the myocardium (heart muscle). Chemotherapy and radiation may be used, though evidence for their effectiveness in pericardial mesothelioma specifically is limited. Pericardiocentesis (draining fluid from the pericardial sac) provides symptomatic relief.
Legal Compensation
Despite its rarity, pericardial mesothelioma caused by asbestos exposure entitles patients to the same legal compensation as other mesothelioma types. Patients and families should consult an experienced mesothelioma attorney who can evaluate exposure history and pursue claims against responsible companies, trust funds, and other sources.
The rarity and often late-stage diagnosis of pericardial mesothelioma makes prompt legal action especially important. Contact 1-800-400-1805 for a free case evaluation.
- Incidence: Approximately 1% of all mesothelioma diagnoses
- Location: Develops in the pericardium (sac surrounding the heart)
- Symptoms: Chest pain, dyspnea, pericardial effusion, heart palpitations
- Diagnosis: Often diagnosed at autopsy; imaging and biopsy when detected in life
- Prognosis: Generally poor due to proximity to the heart and late-stage diagnosis
Reviewed by: Paul Danziger, J.D. — Texas Bar — 30+ years mesothelioma litigation
Last updated: March 15, 2026
Sources: National Cancer Institute, Journal of Thoracic Disease
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